docs: def get_unread_topics(context, topics, user):
      """ This will return a list of unread topics for the given user from a given set of topics.
  
      Usage::
  
          {% get_unread_topics topics request.user as unread_topics %}
  
      """
      request = context.get('request', None)
      return TrackingHandler(request=request).get_unread_topics(topics, user)